--- zzzz-none-000/linux-4.4.60/drivers/gpio/gpio-74x164.c 2017-04-08 07:53:53.000000000 +0000 +++ jet-2400-727/linux-4.4.60/drivers/gpio/gpio-74x164.c 2021-03-17 14:36:41.000000000 +0000 @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -107,8 +108,18 @@ static int gen_74x164_probe(struct spi_device *spi) { struct gen_74x164_chip *chip; + struct gen_74x164_chip_platform_data *pdata; + struct device_node *np; int ret; + pdata = spi->dev.platform_data; + np = spi->dev.of_node; + + if (!np && !pdata) { + dev_err(&spi->dev, "No configuration data available.\n"); + return -EINVAL; + } + /* * bits_per_word cannot be configured in platform data */ @@ -130,18 +141,28 @@ chip->gpio_chip.set = gen_74x164_set_value; chip->gpio_chip.base = -1; - if (of_property_read_u32(spi->dev.of_node, "registers-number", - &chip->registers)) { - dev_err(&spi->dev, - "Missing registers-number property in the DT.\n"); - return -EINVAL; + if (np) { + if (of_property_read_u32(spi->dev.of_node, "registers-number", &chip->registers)) { + dev_err(&spi->dev, "Missing registers-number property in the DT.\n"); + ret = -EINVAL; + goto exit_destroy; + } + } else if (pdata) { + chip->gpio_chip.base = pdata->base; + chip->registers = pdata->num_registers; } + if (!chip->registers) + chip->registers = 1; + chip->gpio_chip.ngpio = GEN_74X164_NUMBER_GPIOS * chip->registers; chip->buffer = devm_kzalloc(&spi->dev, chip->registers, GFP_KERNEL); if (!chip->buffer) return -ENOMEM; + if (pdata && pdata->init_data) + memcpy(chip->buffer, pdata->init_data, chip->registers); + chip->gpio_chip.can_sleep = true; chip->gpio_chip.dev = &spi->dev; chip->gpio_chip.owner = THIS_MODULE; @@ -174,16 +195,18 @@ return 0; } +#ifdef CONFIG_OF static const struct of_device_id gen_74x164_dt_ids[] = { { .compatible = "fairchild,74hc595" }, {}, }; MODULE_DEVICE_TABLE(of, gen_74x164_dt_ids); +#endif static struct spi_driver gen_74x164_driver = { .driver = { .name = "74x164", - .of_match_table = gen_74x164_dt_ids, + .of_match_table = of_match_ptr(gen_74x164_dt_ids), }, .probe = gen_74x164_probe, .remove = gen_74x164_remove,